Merge pull request #143 from retuxx/docu

fixed bootstrap script for Mac OS X

bootstrap.sh

@@ -2,8 +2,7 @@
 
 ################ parameters ################
 # directory where the script is located
-SCRIPT_NAME=$(readlink -f $0)
-SCRIPT_DIR=`dirname $SCRIPT_NAME`
+SCRIPT_DIR=$( cd $(dirname $0); pwd -P)
 
 # directory where dependencies will be installed
 INSTALL_DIR=libs
@@ -21,6 +20,24 @@ TOX_CORE_DIR=libtoxcore-latest
 # if this script gets the parameter -t or --tox
 TOX_ONLY=false
 
+if [ -z "$BASE_DIR" ]; then
+    echo "internal error detected!"
+    echo "BASE_DIR should not be empty... aborting"
+    exit 1
+fi
+
+if [ -z "$SODIUM_DIR" ]; then
+    echo "internal error detected!"
+    echo "SODIUM_DIR should not be empty... aborting"
+    exit 1
+fi
+
+if [ -z "$TOX_CORE_DIR" ]; then
+    echo "internal error detected!"
+    echo "TOX_CORE_DIR should not be empty... aborting"
+    exit 1
+fi
+
 
 
 ########## check input parameters ##########
@@ -54,14 +71,14 @@ fi
 
 
 ############### prepare step ###############
-# create INSTALL_DIR directory if necessary
+# create BASE_DIR directory if necessary
 mkdir -p ${BASE_DIR}
 
 # maybe an earlier run of this script failed
 # thus we should remove the cloned repositories
 # if exists, otherwise cloning them may fail
 rm -rf ${BASE_DIR}/${SODIUM_DIR}
-rm -rf ${SBASE_DIR}/${TOX_CORE}
+rm -rf ${BASE_DIR}/${TOX_CORE_DIR}